这个扩散系数，我们一会就定义出来。
And this diffusion coefficient we'll define in a few moments.
扩散系数是传质过程的一个重要参数。
Diffusivity is an important parameter of the mass transfer process.
估计的反常扩散系数在量级上与实验一致。
The estimated diffusion coefficient agrees with experiment within an order of magnitude.
结果表明，扩散系数随环境湿度增大而增大。
The result shows that the diffusion increases with the increase of relative humidity.
测定了扩散系数、扩散活化能和平衡湿含量。
The diffusion coefficient, diffusion activation energy and equilibrium moisture content were obtained.
并分析了铜在柱状和块状镍镀层中的扩散系数。
Diffusion characteristics of copper in lamellar and columnar nickel deposit are also determined.
氯离子扩散系数随着冻融循环次数的增加而增加。
The chloride concentration and diffusion coefficients increase with Numbers of freezing-thawing cycles.
同时还模拟了流体自扩散系数随温度的变化关系。
The relation of diffusion coefficient with temperature has also been simulated.
在表面覆盖度比较高时，表面扩散系数有一极大值。
There is a maximum of the surface diffusivity in high surface coverage.
结合粘度理论建立了分子扩散系数与活化能之间的关系；
Combined with the theory of viscosity, the relationship between diffusion coefficient and activation energy is expressed.
各期病灶表观扩散系数值及在弥散加权成像上信号不同。
The signals on ADC value and DWI of the focus were different in various stage.
结果表明，蛋白质的孔扩散系数随初始浓度的增大而下降；
The results showed that the pore diffusivity decreased with increasing initial protein concentration.
资产方程中漂移系数和扩散系数的估计是建立方程的前提。
The prerequisites of construction of the assets equation is the estimation of the drift coefficient b(·).
随着介质温度的升高，湿度的降低，横向水分扩散系数增大。
Moisture diffusion coefficients across grain direction increase with medium temperature increasing and humidity decreasing.
除此之外，液体和超临界流体扩散系数的实验数据还比较缺乏。
Additionally, the experimental data on diffusion coefficients of liquids and supercritical fluids is scarce relatively.
在井巷紊流传递过程中，纵向弥散系数远远大于紊流扩散系数。
In mine mass transfer the longitudinal dispersion coefficient is by far greater than the turbulent diffusion coefficient.
针对氯盐侵蚀的预应力混凝土结构，讨论了氯离子扩散系数的计算。
The calculation of chloride diffusion coefficient in prestressed concrete structures eroded by chloride ion is discussed.
为此，用全局归一化的局部方差度量空间细节，得到新的扩散系数。
Therefore, global variance normalized was proposed to measure spatial detail, and then a new diffusion coefficient was given.
一个略加改进的电化学氢渗透技术被用于测定氢在铁膜中的扩散系数。
The diffusion coefficient of hydrogen in an iron membrane was measured using slightly improved electrochemical hydrogen permeation technique.
由对流扩散方程的对流系数和扩散系数确定了局域平衡分布函数的系数。
The coefficients in the equilibrium distribution are determined by the convection coefficient and the diffusion coefficient.
而且为了保持图像特征，利用图像的方向导数局部地调整非线性扩散系数。
To preserve image features, the nonlinear diffusion coefficients are locally adjusted according to the directional derivatives of the image.
实测资料表明该模型可以比较准确地直接计算泥沙扩散系数沿垂线的分布。
It's shown from measured data that the distribution in vertical of sediment diffusion coefficient can be obtained correctly by the model.
结果表明本次示踪实验是成功的，由示踪实验确定的扩散系数值是可靠的。
The results show that the trace experiment is successful and the dispersion coefficients from the trace experiment are reliable.
利用恒流放电法测定了金属氢化物（MH）电极中氢原子扩散系数的平均值。
The average value of hydrogen diffusion coefficient in metal hydride(MH) electrode was measured by constant current discharge method.
发现污染物在土壤中的质量浓度分布与渗流速度、作用时间、扩散系数等有关。
The results showed that the intensity distribution had relation with the velocity of percolation, time, coefficient of convection and diffusion.
在食品包装材料化合物的迁移模型中，扩散系数是决定模型预测性的重要参数之一。
Diffusion coefficient is one of the important parameters deciding migration prediction in migration model of compounds from food packaging material.
催化剂的扩散与湍流扩散系数、风场分布相对应，水平扩散范围大于垂直扩散范围。
On the other hand, the diffusion is corresponded with coefficients of turbulent diffusion and wind distribution, the range of horizontal diffusion is greater than that of vertical diffusion.
从激活能值和计算的扩散常数之间的关系，可以得到氧和氮在钼中的理论扩散系数。
Theoretical diffusion coefficient curves for these systems were also obtained from the relationship between activation energies and the calculated diffusion coefficient constant.
从激活能值和计算的扩散常数之间的关系，可以得到氧和氮在钼中的理论扩散系数。
Theoretical diffusion coefficient curves for these systems were also obtained from the relationship between activation energies and the calculated diffusion coefficient constant.
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